To be fair, Ezio is pretty accustomed to having people shouting at him to get down from things, and if he stopped climbing on shit every single time that happened, he'd never get anything done. At least Hinawa isn't throwing rocks or shooting arrows at him.

"Forgive me, signora! This will take but a moment," he calls back down to her, and continues to climb, utterly disregarding the scolding tone she's taking with him.